Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: HimyKabibble on February 18, 2009, 10:48:29 PM

Title: G31 Bug?
Post by: HimyKabibble on February 18, 2009, 10:48:29 PM

When I do a "G31 Z-0.5000", the Z axis starts moving, and keeps going forever.  Isn't it supposed to stop when it reaches the target position of -0.5000. if it hasn't seen the probe input go active?

Regards,
Ray L.

Title: Re: G31 Bug?
Post by: Tweakie.CNC on February 19, 2009, 02:59:34 AM

Thought I would try this and mine does the same - 'no probe, no stop'.

Tweakie.

Title: Re: G31 Bug?
Post by: Tweakie.CNC on February 19, 2009, 03:19:44 AM

Update.

Restarted Mach and it works fine now - stops as it is supposed to. Could it have been something left in a buffer from the previous program ?.

Tweakie.

Title: Re: G31 Bug?
Post by: Tweakie.CNC on February 19, 2009, 03:29:11 AM

Hi Himy,

After trying many possibilities it only happens when 'Machine Coordinates' are checked. So uncheck and problem solved perhaps ?.

Tweakie.

Title: Re: G31 Bug?
Post by: jimpinder on February 19, 2009, 04:39:30 AM

Ray - As far as I can see, G31 works on Program Co-ordinates only - in other words the number you put in the command refers to the program co-ordinate, not the machine co-ordinate, Perhaps you were looking at the Machine Co-ordinates when you did this.

Title: Re: G31 Bug?
Post by: Greolt on February 19, 2009, 06:04:25 AM

Ray

Is this with the SmoothStepper or LPT ?


Greg

Title: Re: G31 Bug?
Post by: HimyKabibble on February 19, 2009, 10:24:28 AM

Makes no difference whether I'm in machine or user coordinates.  I zero both, issue the G31, and off it goes, never to stop.  I"m just doing it in simulation, right now, no machine at all.

Regards,
Ray L.

Title: Re: G31 Bug?
Post by: HimyKabibble on February 19, 2009, 09:58:57 PM

Turns out, G31 does not work right if you don't have the PP driver installed.....

Regards,
Ray L.

Title: Re: G31 Bug?
Post by: jimpinder on February 20, 2009, 03:15:36 AM

I take it you mean the Mach 3 drivers installed - because it seems to work alright on both my computers, one with and one without machines attached, but both with drivers..

Title: Re: G31 Bug?
Post by: HimyKabibble on February 20, 2009, 11:09:06 AM

Quote from: jimpinder on February 20, 2009, 03:15:36 AM

I take it you mean the Mach 3 drivers installed - because it seems to work alright on both my computers, one with and one without machines attached, but both with drivers..

Correct.